Insertion reaction of elemental sulfur into the Ln–C bond: Synthesis and characterization of [(C 5H 4SiMe 2tBu) 2Ln(μ-SR)] 2 (R = Me, Ln = Yb, Er, Dy, Y; R = nBu, Ln = Yb, Dy)

Abstract

Treatment of (C 5H 4SiMe 2 t Bu) 2LnR with 1 equiv of elemental sulfur in toluene at ambient temperature gives dimeric complexes [(C 5H 4SiMe 2 t Bu) 2Ln(μ-SR)] 2 [R = Me, Ln = Yb ( 1), Er ( 2), Dy ( 3), Y ( 4); R = n Bu, Ln = Yb ( 5), Dy ( 6)]. All these complexes have been characterized by elemental analysis, IR and mass spectroscopies. The structures of complexes 1, 3, 5 and 6 are also determined through X-ray single crystal diffraction analysis, indicating that only one sulfur atom from elemental sulfur inserts into Ln–C σ-bond.